US3607858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing lyophilized human blood proteins such as gamma globulin in the presence of a nonionic surfactant
Assignee: Wyeth Holdings LLC
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Filing: 1970-03-31
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Granted: 1971-09-21
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Expires: 1990-03-31
Abstract
Abstract Human blood proteins, such as alpha globulin, beta globulin, albumin, and particularly gamma globulin, are prepared in dry lyophilized form by freeze drying an aqueous solution in the presence of small amounts of nonionic surface active agents, the initial freezing being very rapid, from 1 to 3 minutes, preferably by freezing in small containers, such as vials, immersed in an alcohol Dry Ice bath.
Inventors
- 👤 Merle Vernon Querry
- 👤 Francis Fremonte Buck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:22
CPC Classifications
C; C07; C07K; C07K16/00; C07K16/06; Y; Y10; Y10S; Y10S530/00; Y10S530/827; Y10S530/829; Y10S530/83; Y10S530/831
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
14 words
A process according to claim 1 in which the protein is immune serum globulin.
Claim 2
Dependent Claim
34 words
A process according to claim 2 in which the rapid freezing is effected by immersing a small container containing the solution of the immune serum globulin in a bath of ethanol and Dry Ice.
Claim 3
Dependent Claim
34 words
A process according to claim 1 in which the rapid freezing is effected by immersing a small container containing the solution of the immune serum globulin in a bath of ethanol and Dry Ice.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |